(AP) – U.S. Sen. Susan Collins says allowabletruck weights on Maine and Vermont interstates are scheduled tofall back to 80,000 pounds at the end of the day after the U.S.Senate abandoned a federal funding bill that included a provisionallowing for heavy trucks. Collins says a one-year pilot program to allow trucks of up to100,000 pounds on Maine’s and Vermont’s federal interstate highwayswill expire Friday. An effort to extend the higher limit failed. Supporters say allowing heavier trucks on federal highwayspromotes safety by keeping them off secondary roads. But critics say heavier trucks compromise the safety of othermotorists and damage highways and bridges.